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Utility Rate Regulation - Regulatory Matters (Details) $ in Millions |  |  |  |  |  |  |  | 1 Months Ended | 3 Months Ended | 6 Months Ended
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Mar. 29, 2023 USD ($) | Mar. 21, 2023 USD ($) | Feb. 03, 2023 USD ($) | Jan. 27, 2023 USD ($) | Dec. 15, 2022 MW | Oct. 16, 2018 | Aug. 24, 2018 | Nov. 30, 2022 USD ($) | Jun. 30, 2023 USD ($) MW | Jun. 30, 2022 USD ($) | Jun. 30, 2015 | Jun. 30, 2023 USD ($) MW | Jun. 30, 2022 USD ($)
March 2023 Kentucky Wind Storms |  |  |  |  |  |  |  |  |  |  |  |  |
Regulatory Matters - Rate Case Proceedings (Numeric) [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |
Amount of Regulatory Costs Not yet Approved | $ |  |  |  |  |  |  |  |  | $ 75 |  |  | $ 75 |
PPL Electric [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Regulatory Matters - Rate Case Proceedings (Numeric) [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |
Amortization of Revenue Reserve for ROE Challenge | $ |  |  |  |  |  |  |  |  | 30 |  |  | 74 |
PPL Electric [Member] | Unaffiliated Third Party Entity [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Regulatory Matters - Rate Case Proceedings (Numeric) [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |
Accounts Receivable, Purchase | $ |  |  |  |  |  |  |  |  | $ 374 | $ 273 |  | $ 732 | $ 622
LGE [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Regulatory Matters - Rate Case Proceedings (Numeric) [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |
CPCN NGCC Combustion Turbine Facilities Power |  |  |  |  | 621 |  |  |  |  |  |  |  |
CPCN Solar Photovoltaic Facility to be constructed, Power |  |  |  |  | 120 |  |  |  |  |  |  |  |
CPCN Solar Photovoltaic Facility to be acquired, Power |  |  |  |  | 120 |  |  |  |  |  |  |  |
CPCN 4-Hour Energy Storage Facility to be Constructed, Power |  |  |  |  | 125 |  |  |  |  |  |  |  |
CPCN New and Adjusted Energy Efficiency Programs, Overall Power Need Reduction |  |  |  |  | 100 |  |  |  |  |  |  |  |
Total Capacity of Power Purchase Agreements Not Subject to KPSC Approval, Power |  |  |  |  | 637 |  |  |  |  |  |  |  |
New NGCC LG&E Planned Ownership Percentage |  |  |  |  |  |  |  |  |  |  |  | 31.00% |
New Solar Units LG&E Planned Ownership Percentage |  |  |  |  |  |  |  |  |  |  |  | 37.00% |
Mill Creek 1 Unit, Generation Capacity, Power |  |  |  |  |  |  |  |  | 300 |  |  | 300 |
E. W. Brown 3 Unit, Generation Capacity, Power |  |  |  |  |  |  |  |  | 412 |  |  | 412 |
Mill Creek 2 Unit, Generation Capacity, Power |  |  |  |  |  |  |  |  | 297 |  |  | 297 |
Ghent 2 Unit, Generation Capacity, Power |  |  |  |  |  |  |  |  | 486 |  |  | 486 |
LGE [Member] | March 2023 Kentucky Wind Storms |  |  |  |  |  |  |  |  |  |  |  |  |
Regulatory Matters - Rate Case Proceedings (Numeric) [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |
Amount of Regulatory Costs Not yet Approved | $ |  |  |  |  |  |  |  |  | $ 33 |  |  | $ 33 |
LGE [Member] | Federal Energy Regulatory Commsion [Member] | Other Regulatory Assets [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Regulatory Matters - Rate Case Proceedings (Numeric) [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |
Increase (Decrease) in Regulatory Liabilities | $ |  |  |  |  |  |  |  |  | $ 3 |  |  |  |
KU [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Regulatory Matters - Rate Case Proceedings (Numeric) [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |
CPCN NGCC Combustion Turbine Facilities Power |  |  |  |  | 621 |  |  |  |  |  |  |  |
CPCN Solar Photovoltaic Facility to be constructed, Power |  |  |  |  | 120 |  |  |  |  |  |  |  |
CPCN Solar Photovoltaic Facility to be acquired, Power |  |  |  |  | 120 |  |  |  |  |  |  |  |
CPCN 4-Hour Energy Storage Facility to be Constructed, Power |  |  |  |  | 125 |  |  |  |  |  |  |  |
CPCN New and Adjusted Energy Efficiency Programs, Overall Power Need Reduction |  |  |  |  | 100 |  |  |  |  |  |  |  |
Total Capacity of Power Purchase Agreements Not Subject to KPSC Approval, Power |  |  |  |  | 637 |  |  |  |  |  |  |  |
New NGCC KU Planned Ownership Percentage |  |  |  |  |  |  |  |  |  |  |  | 69.00% |
New Solar units LG&E Planned Ownership Percentage |  |  |  |  |  |  |  |  |  |  |  | 63.00% |
Mill Creek 1 Unit, Generation Capacity, Power |  |  |  |  |  |  |  |  | 300 |  |  | 300 |
E. W. Brown 3 Unit, Generation Capacity, Power |  |  |  |  |  |  |  |  | 412 |  |  | 412 |
Mill Creek 2 Unit, Generation Capacity, Power |  |  |  |  |  |  |  |  | 297 |  |  | 297 |
Ghent 2 Unit, Generation Capacity, Power |  |  |  |  |  |  |  |  | 486 |  |  | 486 |
KU [Member] | March 2023 Kentucky Wind Storms |  |  |  |  |  |  |  |  |  |  |  |  |
Regulatory Matters - Rate Case Proceedings (Numeric) [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |
Amount of Regulatory Costs Not yet Approved | $ |  |  |  |  |  |  |  |  | $ 42 |  |  | $ 42 |
KU [Member] | Federal Energy Regulatory Commsion [Member] | Other Regulatory Assets [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Regulatory Matters - Rate Case Proceedings (Numeric) [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |
Increase (Decrease) in Regulatory Liabilities | $ |  |  |  |  |  |  |  |  | 8 |  |  |  |
Rhode Island Energy | Rhode Island Public Uitilty Commsion |  |  |  |  |  |  |  |  |  |  |  |  |
Regulatory Matters - Rate Case Proceedings (Numeric) [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |
Public Utilities, Approved Return on Equity, Percentage |  |  |  |  |  |  | 9.275% |  |  |  |  |  |
Supplemental Capital Investment to spend on the FY 2024 Gas ISR Plan | $ |  |  |  | $ 187 |  |  |  |  |  |  |  |  |
Supplemental Capital Investment Spend amount agreed to between RIE and RIPUC | $ |  |  | $ 171 |  |  |  |  |  |  |  |  |  |
Supplemental Capital Investment to spend on the FY 2024 Electric ISR Plan | $ |  |  |  | 176 |  |  |  |  |  |  |  |  |
2nd Supplemental Capita Investment to spend on the FY 2024 Electrical ISR Plan | $ |  | $ 166 |  |  |  |  |  |  |  |  |  |  |
RIPUC Approved FY 2024 Gas ISR Plan for capital investment spend | $ | $ 163 |  |  |  |  |  |  |  |  |  |  |  |
RIPUC Approved FY 2024 Electric ISR Plan for capital investment spend | $ | 112 |  |  |  |  |  |  |  |  |  |  |  |
Estimated net present value costs of AMF program | $ |  |  |  |  |  |  |  | $ 188 |  |  |  |  |
Benefit - cost ratio yield of the AMF program |  |  |  |  |  |  |  | 3.90% |  |  |  |  |
NPV to be obtained through AMF program over 20 years | $ |  |  |  |  |  |  |  | $ 729 |  |  |  |  |
AMF Program Project Life, Years |  |  |  |  |  |  |  | 20 years |  |  |  |  |
Rhode Island Energy | Rhode Island Public Uitilty Commsion | Vegetation management |  |  |  |  |  |  |  |  |  |  |  |  |
Regulatory Matters - Rate Case Proceedings (Numeric) [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |
Supplemental Capital Investment to spend on the FY 2024 Electric ISR Plan | $ |  |  |  | 14 |  |  |  |  |  |  |  |  |
2nd Supplemental Capita Investment to spend on the FY 2024 Electrical ISR Plan | $ |  | 14 |  |  |  |  |  |  |  |  |  |  |
RIPUC Approved FY 2024 Electric ISR Plan for capital investment spend | $ | 14 |  |  |  |  |  |  |  |  |  |  |  |
Rhode Island Energy | Rhode Island Public Uitilty Commsion | Other O&M |  |  |  |  |  |  |  |  |  |  |  |  |
Regulatory Matters - Rate Case Proceedings (Numeric) [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |
Supplemental Capital Investment to spend on the FY 2024 Electric ISR Plan | $ |  |  |  | $ 3 |  |  |  |  |  |  |  |  |
2nd Supplemental Capita Investment to spend on the FY 2024 Electrical ISR Plan | $ |  | $ 1 |  |  |  |  |  |  |  |  |  |  |
RIPUC Approved FY 2024 Electric ISR Plan for capital investment spend | $ | $ 1 |  |  |  |  |  |  |  |  |  |  |  |
Rhode Island Energy | Rhode Island Public Uitilty Commsion | Common equity percentage related to approved rate |  |  |  |  |  |  |  |  |  |  |  |  |
Regulatory Matters - Rate Case Proceedings (Numeric) [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of common equity used on allowed ROE |  |  |  |  |  |  | 51.00% |  |  |  |  |  |
Rhode Island Energy | Federal Energy Regulatory Commsion [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Regulatory Matters - Rate Case Proceedings (Numeric) [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |
New ROE prosed by NETO and approved by FERC |  |  |  |  |  | 10.41% |  |  |  |  |  |  |
Initial minimum base ROE to be reset by the FERC |  |  |  |  |  |  |  |  |  |  | 11.14% |  |
Maximum Base ROE reset by FERC |  |  |  |  |  |  |  |  |  |  | 11.74% |  |
Minimum base ROE reset by FERC |  |  |  |  |  |  |  |  |  |  | 10.57% |  |
Rhode Island Energy | Federal Energy Regulatory Commsion [Member] | Maximum ROE authorized |  |  |  |  |  |  |  |  |  |  |  |  |
Regulatory Matters - Rate Case Proceedings (Numeric) [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |
FERC Granted ROE |  |  |  |  |  |  |  |  |  |  |  | 11.74% |
PPL Electric Utilities Corp [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Regulatory Matters - Rate Case Proceedings (Numeric) [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |
Amortization of Revenue Reserve for ROE Challenge | $ |  |  |  |  |  |  |  |  | 30 |  |  | $ 74 |
PPL Electric Utilities Corp [Member] | Unaffiliated Third Party Entity [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Regulatory Matters - Rate Case Proceedings (Numeric) [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |
Accounts Receivable, Purchase | $ |  |  |  |  |  |  |  |  | $ 374 | $ 273 |  | $ 732 | $ 622
Louisville Gas And Electric Co [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Regulatory Matters - Rate Case Proceedings (Numeric) [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |
CPCN NGCC Combustion Turbine Facilities Power |  |  |  |  | 621 |  |  |  |  |  |  |  |
CPCN Solar Photovoltaic Facility to be constructed, Power |  |  |  |  | 120 |  |  |  |  |  |  |  |
CPCN Solar Photovoltaic Facility to be acquired, Power |  |  |  |  | 120 |  |  |  |  |  |  |  |
CPCN 4-Hour Energy Storage Facility to be Constructed, Power |  |  |  |  | 125 |  |  |  |  |  |  |  |
CPCN New and Adjusted Energy Efficiency Programs, Overall Power Need Reduction |  |  |  |  | 100 |  |  |  |  |  |  |  |
Total Capacity of Power Purchase Agreements Not Subject to KPSC Approval, Power |  |  |  |  | 637 |  |  |  |  |  |  |  |
New NGCC LG&E Planned Ownership Percentage |  |  |  |  |  |  |  |  |  |  |  | 31.00% |
New Solar Units LG&E Planned Ownership Percentage |  |  |  |  |  |  |  |  |  |  |  | 37.00% |
Mill Creek 1 Unit, Generation Capacity, Power |  |  |  |  |  |  |  |  | 300 |  |  | 300 |
E. W. Brown 3 Unit, Generation Capacity, Power |  |  |  |  |  |  |  |  | 412 |  |  | 412 |
Mill Creek 2 Unit, Generation Capacity, Power |  |  |  |  |  |  |  |  | 297 |  |  | 297 |
Ghent 2 Unit, Generation Capacity, Power |  |  |  |  |  |  |  |  | 486 |  |  | 486 |
Louisville Gas And Electric Co [Member] | March 2023 Kentucky Wind Storms |  |  |  |  |  |  |  |  |  |  |  |  |
Regulatory Matters - Rate Case Proceedings (Numeric) [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |
Amount of Regulatory Costs Not yet Approved | $ |  |  |  |  |  |  |  |  | $ 33 |  |  | $ 33 |
Louisville Gas And Electric Co [Member] | Federal Energy Regulatory Commsion [Member] | Other Regulatory Assets [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Regulatory Matters - Rate Case Proceedings (Numeric) [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |
Increase (Decrease) in Regulatory Liabilities | $ |  |  |  |  |  |  |  |  | $ 3 |  |  |  |
Kentucky Utilities Co [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Regulatory Matters - Rate Case Proceedings (Numeric) [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |
CPCN NGCC Combustion Turbine Facilities Power |  |  |  |  | 621 |  |  |  |  |  |  |  |
CPCN Solar Photovoltaic Facility to be constructed, Power |  |  |  |  | 120 |  |  |  |  |  |  |  |
CPCN Solar Photovoltaic Facility to be acquired, Power |  |  |  |  | 120 |  |  |  |  |  |  |  |
CPCN 4-Hour Energy Storage Facility to be Constructed, Power |  |  |  |  | 125 |  |  |  |  |  |  |  |
CPCN New and Adjusted Energy Efficiency Programs, Overall Power Need Reduction |  |  |  |  | 100 |  |  |  |  |  |  |  |
Total Capacity of Power Purchase Agreements Not Subject to KPSC Approval, Power |  |  |  |  | 637 |  |  |  |  |  |  |  |
New NGCC KU Planned Ownership Percentage |  |  |  |  |  |  |  |  |  |  |  | 69.00% |
New Solar units LG&E Planned Ownership Percentage |  |  |  |  |  |  |  |  |  |  |  | 63.00% |
Mill Creek 1 Unit, Generation Capacity, Power |  |  |  |  |  |  |  |  | 300 |  |  | 300 |
E. W. Brown 3 Unit, Generation Capacity, Power |  |  |  |  |  |  |  |  | 412 |  |  | 412 |
Mill Creek 2 Unit, Generation Capacity, Power |  |  |  |  |  |  |  |  | 297 |  |  | 297 |
Ghent 2 Unit, Generation Capacity, Power |  |  |  |  |  |  |  |  | 486 |  |  | 486 |
Kentucky Utilities Co [Member] | March 2023 Kentucky Wind Storms |  |  |  |  |  |  |  |  |  |  |  |  |
Regulatory Matters - Rate Case Proceedings (Numeric) [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |
Amount of Regulatory Costs Not yet Approved | $ |  |  |  |  |  |  |  |  | $ 42 |  |  | $ 42 |
Kentucky Utilities Co [Member] | Federal Energy Regulatory Commsion [Member] | Other Regulatory Assets [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Regulatory Matters - Rate Case Proceedings (Numeric) [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |
Increase (Decrease) in Regulatory Liabilities | $ |  |  |  |  |  |  |  |  | $ 8 |  |  |  |

X
- Definition 2nd Additional amount added to the FY 2024 Electrical ISR Plan as required by the RIPUC. + References No definition available. + Details
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- Definition The total project life of the Advanced Metering Functionality program in years. + References No definition available. + Details
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Namespace Prefix: | ppl_
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Balance Type: | na
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- Definition Amount of revenue reserve refunded to customers as a result of a challenge to the transmission formula rate return on equity. + References No definition available. + Details
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Data Type: | xbrli:monetaryItemType
Balance Type: | debit
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- Definition The Benefit - cost ratio that the AMF program is due to yield over the life of the project. + References No definition available. + Details
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Balance Type: | na
Period Type: | duration

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- Definition The power rating of the 4-hour battery energy storage facility applied for via CPCN to be constructed at the E.W. Brown Generating Station in Mercer County, Kentucky. + References No definition available. + Details
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Balance Type: | na
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- Definition CPCN NGCC Combustion Turbine Facilities Power + References No definition available. + Details
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Data Type: | xbrli:integerItemType
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- Definition The amount of power need to be reduced by the implementation of proposed new and adjusted energy efficiency programs as part of a CPCN application. + References No definition available. + Details
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- Definition CPCN Solar Photovoltaic Facility to be acquired, Power + References No definition available. + Details
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- Definition CPCN Solar Photovoltaic Facility to be constructed, Power + References No definition available. + Details
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- Definition The total generating capacity of the E. W. Brown 3 Unit in megawatts. + References No definition available. + Details
Name: | ppl_EWBrown3UnitGenerationCapacityPower
Namespace Prefix: | ppl_
Data Type: | dtr-types:powerItemType
Balance Type: | na
Period Type: | instant

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- Definition Estimated costs on a net present value basis for Advanced Metering Functionality program. + References No definition available. + Details
Name: | ppl_EstimatedNetPresentValueCostsOfAMFProgram
Namespace Prefix: | ppl_
Data Type: | xbrli:monetaryItemType
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- Definition FERC Granted ROE + References No definition available. + Details
Name: | ppl_FERCGrantedROE
Namespace Prefix: | ppl_
Data Type: | dtr-types1:percentItemType
Balance Type: | na
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- Definition The total generating capacity of the Ghent 2 Unit in megawatts. + References No definition available. + Details
Name: | ppl_Ghent2UnitGenerationCapacityPower
Namespace Prefix: | ppl_
Data Type: | dtr-types:powerItemType
Balance Type: | na
Period Type: | instant

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- Definition Initial minimum base ROE to be reset by the FERC + References No definition available. + Details
Name: | ppl_InitialMinimumBaseROEToBeResetByTheFERC
Namespace Prefix: | ppl_
Data Type: | dtr-types1:percentItemType
Balance Type: | na
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- Definition Maximum Base ROE reset by FERC + References No definition available. + Details
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Balance Type: | na
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- Definition The total generating capacity of the Mill Creek 1 Unit in megawatts. + References No definition available. + Details
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Data Type: | dtr-types:powerItemType
Balance Type: | na
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- Definition The total generating capacity of the Mill Creek 2 Unit in megawatts. + References No definition available. + Details
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Balance Type: | na
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- Definition Minimum base ROE reset by FERC + References No definition available. + Details
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Balance Type: | na
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- Definition Net present value to be obtained through AMF program over the life of the project. + References No definition available. + Details
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Namespace Prefix: | ppl_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
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- Definition The percentage of ownership of the planned NGCC facilities owned by KU. + References No definition available. + Details
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Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

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- Definition The percentage ownership of the planned NGCC facilities to be owned by LG&E>New NGCC LG&E + References No definition available. + Details
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Data Type: | dtr-types:percentItemType
Balance Type: | na
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- Definition New ROE by National Grid along with other NETOs who filed a brief supporting FERC's new methodology and confirming the illustrative numbers that FERC arrived at in its order addressing all four complaints + References No definition available. + Details
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Data Type: | dtr-types1:percentItemType
Balance Type: | na
Period Type: | duration

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- Definition Percentage ownership of the planned solar units to be owned by KU. + References No definition available. + Details
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Namespace Prefix: | ppl_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

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- Definition The percentage ownership of the planned solar units to be owned by LG&E. + References No definition available. + Details
Name: | ppl_NewSolarUnitsLGEPlannedOwnershipPercentage
Namespace Prefix: | ppl_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

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- Definition Percentage of common equity ratio PIPUC used on used to determine thee allowed ROE + References No definition available. + Details
Name: | ppl_PercentageOfCommonEquityUsedOnAllowedROE
Namespace Prefix: | ppl_
Data Type: | dtr-types1:percentItemType
Balance Type: | na
Period Type: | duration

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- Definition Total capital spend approved by the RIPUC for the FY 2024 Electric ISR Plan. + References No definition available. + Details
Name: | ppl_RIPUCApprovedFY2024ElectricISRPlanForCapitalInvestmentSpend
Namespace Prefix: | ppl_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Total capital spend approved by the RIPUC for the FY 2024 Gas ISR plan + References No definition available. + Details
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Data Type: | xbrli:monetaryItemType
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- Definition Regulatory Matters Kentucky Activities Rate Case Proceedings [Abstract] + References No definition available. + Details
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- Definition The Total Capacity of non-firm energy-related power purchase agreements entered into for the output of four solar photovoltaic facilities that are not subject to KPSC approval. + References No definition available. + Details
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